This is a giant cleaver-like blade wielded by Darui. It is broad with a fairly long hilt and has three hinges running along the blade itself that allows him to fold it when not in use and unfold it in battle. Darui can also imbue it with lightning-natured chakra to increase its lethality, and the blade is also able to maintain the charge, even if he is no longer holding the blade.[1]

Trivia

Darui tends to not carry the blade around with him while in Kumogakure.